Dental bur



FIG. 1 is a perspective view of a dental bur showing my new design;

FIG. 2 is a right side elevation thereof;

FIG. 3 is an inverted left side elevation thereof;

FIG. 4 is an end elevation thereof shown on an enlarged scale;

FIG. 5 is a right side elevation of a modified embodiment of the design shown in FIGS. 1 through 4; and,

FIG. 6 is an inverted left side elevation thereof.

The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a dental bur, as shown and described. 